diff --git a/geopandas/base.py b/geopandas/base.py
index abe3c85..6955219 100644
--- a/geopandas/base.py
+++ b/geopandas/base.py
@@ -393,7 +393,7 @@ GeometryCollection
         features that have a z-component.
 
         Notes
-        ------
+        -----
         Every operation in GeoPandas is planar, i.e. the potential third
         dimension is not taken into account.
 
@@ -627,7 +627,7 @@ GeometryCollection
         Applies to GeoSeries containing only Polygons.
 
         Returns
-        ----------
+        -------
         inner_rings: Series of List
             Inner rings of each polygon in the GeoSeries.
 
@@ -2979,7 +2979,7 @@ GeometryCollection
             If False, the order of elements is preserved.
 
         Returns
-        ----------
+        -------
         spatial_relations: Series of strings
             The DE-9IM intersection matrices which describe
             the spatial relations of the other geometry.
diff --git a/geopandas/geodataframe.py b/geopandas/geodataframe.py
index d5be395..9b81697 100644
--- a/geopandas/geodataframe.py
+++ b/geopandas/geodataframe.py
@@ -1474,12 +1474,9 @@ individually so that features may have different properties
         -----
         The extra arguments ``*args`` and keyword arguments ``**kwargs`` are
         passed to DataFrame.merge.
-
-        Reference
-        ---------
-        https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas\
-        .DataFrame.merge.html
-
+        See https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas\
+.DataFrame.merge.html
+        for more details.
         """
         result = DataFrame.merge(self, *args, **kwargs)
         geo_col = self._geometry_column_name
@@ -2078,7 +2075,7 @@ individually so that features may have different properties
     Europe    Austria    AUT    416600.0
 
         Notes
-        ------
+        -----
         Every operation in GeoPandas is planar, i.e. the potential third
         dimension is not taken into account.
 
@@ -2345,7 +2342,7 @@ countries_w_city_data[countries_w_city_data["name_left"] == "Italy"]
         overlay : equivalent top-level function
 
         Notes
-        ------
+        -----
         Every operation in GeoPandas is planar, i.e. the potential third
         dimension is not taken into account.
         """
diff --git a/geopandas/plotting.py b/geopandas/plotting.py
index bd2fcb3..961999a 100644
--- a/geopandas/plotting.py
+++ b/geopandas/plotting.py
@@ -527,20 +527,20 @@ def plot_dataframe(
         dataframe. Values are used to color the plot. Ignored if `color` is
         also set.
     kind: str
-        The kind of plots to produce:
-         - 'geo': Map (default)
-         Pandas Kinds
-         - 'line' : line plot
-         - 'bar' : vertical bar plot
-         - 'barh' : horizontal bar plot
-         - 'hist' : histogram
-         - 'box' : BoxPlot
-         - 'kde' : Kernel Density Estimation plot
-         - 'density' : same as 'kde'
-         - 'area' : area plot
-         - 'pie' : pie plot
-         - 'scatter' : scatter plot
-         - 'hexbin' : hexbin plot.
+        The kind of plots to produce. The default is to create a map ("geo").
+        Other supported kinds of plots from pandas:
+
+        - 'line' : line plot
+        - 'bar' : vertical bar plot
+        - 'barh' : horizontal bar plot
+        - 'hist' : histogram
+        - 'box' : BoxPlot
+        - 'kde' : Kernel Density Estimation plot
+        - 'density' : same as 'kde'
+        - 'area' : area plot
+        - 'pie' : pie plot
+        - 'scatter' : scatter plot
+        - 'hexbin' : hexbin plot.
     cmap : str (default None)
         The name of a colormap recognized by matplotlib.
     color : str, np.array, pd.Series (default None)
diff --git a/geopandas/tools/hilbert_curve.py b/geopandas/tools/hilbert_curve.py
index 69c6c42..4568dea 100644
--- a/geopandas/tools/hilbert_curve.py
+++ b/geopandas/tools/hilbert_curve.py
@@ -18,7 +18,7 @@ def _hilbert_distance(geoms, total_bounds=None, level=16):
         have coordinates in the range [0, 2^level - 1]).
 
     Returns
-    ---------
+    -------
     np.ndarray
         Array containing distances along the Hilbert curve
 
@@ -54,7 +54,7 @@ def _continuous_to_discrete_coords(bounds, level, total_bounds):
     total_bounds : Total bounds of geometries - array
 
     Returns
-    ---------
+    -------
     Discrete two-dimensional numpy array
     Two-dimensional array Array of hilbert distances for each geom
 
@@ -98,7 +98,7 @@ def _continuous_to_discrete(vals, val_range, n):
     n : Number of discrete values
 
     Returns
-    ---------
+    -------
     One-dimensional array of discrete ints
 
     """
diff --git a/geopandas/tools/overlay.py b/geopandas/tools/overlay.py
index ead7d81..674072b 100644
--- a/geopandas/tools/overlay.py
+++ b/geopandas/tools/overlay.py
@@ -227,7 +227,7 @@ def overlay(df1, df2, how="intersection", keep_geom_type=None, make_valid=True):
     GeoDataFrame.overlay : equivalent method
 
     Notes
-    ------
+    -----
     Every operation in GeoPandas is planar, i.e. the potential third
     dimension is not taken into account.
     """
diff --git a/geopandas/tools/sjoin.py b/geopandas/tools/sjoin.py
index fae6443..fcb679a 100644
--- a/geopandas/tools/sjoin.py
+++ b/geopandas/tools/sjoin.py
@@ -91,7 +91,7 @@ stria    AUT    416600.0
     GeoDataFrame.sjoin : equivalent method
 
     Notes
-    ------
+    -----
     Every operation in GeoPandas is planar, i.e. the potential third
     dimension is not taken into account.
     """